https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63661
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Known to work| |4.8.3 Target Milestone|--- |4.9.2 Summary|-O2 miscompiles on OSX |[4.9/5 Regression] -O2 |10.10 Yosemite |miscompiles on OSX 10.10 | |Yosemite Known to fail| |4.9.1, 5.0 --- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> --- 4.8 doesn't know nehalem but works with -mtune=native (where 4.9 and 5 break).